[OE-core] [PATCH 1/2 v3] image_types: Add elf image type

[Raymond Danks]

On x86, an ELF image file may be stored as a coreboot payload.
The image file is constructed, using the mkelfimage utility,
from a kernel and an initrd.

Signed-off-by: Raymond Danks <ray.danks at se-eng.com>
---
This was originally submitted to the openembedded project:
http://patches.openembedded.org/patch/7689/

v3:
 Include DEPLOY_DIR_IMAGE and KERNEL_IMAGETYPE for location of ELF_KERNEL

 meta/classes/image_types.bbclass |   18 +++++++++++++++++-
 1 files changed, 17 insertions(+), 1 deletions(-)

diff --git a/meta/classes/image_types.bbclass b/meta/classes/image_types.bbclass
index 55f122e..64fa14a 100644
--- a/meta/classes/image_types.bbclass
+++ b/meta/classes/image_types.bbclass
@@ -7,6 +7,12 @@ def get_imagecmds(d):
     ctypes = d.getVar('COMPRESSIONTYPES', True).split()
     cimages = {}
 
+    if "elf" in alltypes:
+        alltypes.remove("elf")
+        if "cpio.gz" not in alltypes:
+                alltypes.append("cpio.gz")
+        alltypes.append("elf")
+
     # Filter out all the compressed images from types
     for type in alltypes:
         basetype = None
@@ -173,6 +179,14 @@ IMAGE_CMD_cpio () {
 	cd ${IMAGE_ROOTFS} && (find . | cpio -o -H newc >${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.cpio)
 }
 
+ELF_KERNEL ?= ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}
+ELF_APPEND ?= "ramdisk_size=32768 root=/dev/ram0 rw console=" 
+
+IMAGE_CMD_elf () {
+	test -f ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.elf && rm -f ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.elf 
+	mkelfImage --kernel=${ELF_KERNEL} --initrd=${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.cpio.gz --output=${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.elf --append='${ELF_APPEND}' ${EXTRA_IMAGECMD}
+}
+
 UBI_VOLNAME ?= "${MACHINE}-rootfs"
 
 IMAGE_CMD_ubi () {
@@ -199,6 +213,7 @@ EXTRA_IMAGECMD_ext2 ?= "-i 8192"
 EXTRA_IMAGECMD_ext3 ?= "-i 8192"
 EXTRA_IMAGECMD_ext4 ?= "-i 8192"
 EXTRA_IMAGECMD_btrfs ?= ""
+EXTRA_IMAGECMD_elf ?= ""
 
 IMAGE_DEPENDS = ""
 IMAGE_DEPENDS_jffs2 = "mtd-utils-native"
@@ -210,11 +225,12 @@ IMAGE_DEPENDS_ext4 = "genext2fs-native e2fsprogs-native"
 IMAGE_DEPENDS_btrfs = "btrfs-tools-native"
 IMAGE_DEPENDS_squashfs = "squashfs-tools-native"
 IMAGE_DEPENDS_squashfs-lzma = "squashfs-lzma-tools-native"
+IMAGE_DEPENDS_elf = "virtual/kernel mkelfimage-native"
 IMAGE_DEPENDS_ubi = "mtd-utils-native"
 IMAGE_DEPENDS_ubifs = "mtd-utils-native"
 
 # This variable is available to request which values are suitable for IMAGE_FSTYPES
-IMAGE_TYPES = "jffs2 sum.jffs2 cramfs ext2 ext2.gz ext2.bz2 ext3 ext3.gz ext2.lzma btrfs live squashfs squashfs-lzma ubi tar tar.gz tar.bz2 tar.xz cpio cpio.gz cpio.xz cpio.lzma vmdk"
+IMAGE_TYPES = "jffs2 sum.jffs2 cramfs ext2 ext2.gz ext2.bz2 ext3 ext3.gz ext2.lzma btrfs live squashfs squashfs-lzma ubi tar tar.gz tar.bz2 tar.xz cpio cpio.gz cpio.xz cpio.lzma vmdk elf"
 
 COMPRESSIONTYPES = "gz bz2 lzma xz"
 COMPRESS_CMD_lzma = "lzma -k -f -7 ${IMAGE_NAME}.rootfs.${type}"
-- 
1.7.0.4